/* LMXFORGE v21: UI improvements (accessibility, filters, roadmap, article TOC, calculator result bar) */

/* ---- Slightly lighter muted text for small mono labels (was #8a877f) ---- */
:root { --forge-muted: #9b988f; }

/* ---- Accessibility ---- */
:focus-visible {
  outline: 2px solid var(--forge-accent, #f59e0b);
  outline-offset: 2px;
}
a:focus-visible, button:focus-visible, summary:focus-visible { border-radius: 3px; }
input:focus-visible, select:focus-visible, textarea:focus-visible { outline-offset: 0; }

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 1000;
  padding: 0.6rem 1rem;
  background: var(--forge-accent, #f59e0b);
  color: #0e0e0f;
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 0 0 4px 4px;
  transition: top 0.15s;
}
.skip-link:focus { top: 0; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto !important; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* ---- Home page ---- */
.hero-stat-row { flex-wrap: wrap; justify-content: center; gap: 1.5rem 3rem; }
.tutorial-grid.single { grid-template-columns: minmax(0, 440px); }

/* ---- Articles index: filter bar ---- */
.v21-filterbar {
  margin: 2rem 0 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}
.v21-search {
  width: 100%;
  max-width: 460px;
  padding: 11px 14px;
  background: var(--forge-surface2);
  border: 0.5px solid var(--forge-border-hover, rgba(255, 255, 255, 0.14));
  border-radius: 4px;
  color: var(--forge-text);
  font-family: var(--font);
  font-size: 14px;
  outline: none;
}
.v21-search:focus { border-color: var(--forge-accent); }
.v21-chips { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.v21-chip {
  background: transparent;
  border: 0.5px solid var(--forge-border-hover, rgba(255, 255, 255, 0.14));
  color: var(--forge-muted);
  font-family: var(--font-mono, monospace);
  font-size: 11px;
  letter-spacing: 0.08em;
  padding: 6px 12px;
  border-radius: 999px;
  cursor: pointer;
}
.v21-chip:hover { color: var(--forge-text); }
.v21-chip[aria-pressed="true"] {
  background: var(--forge-accent-dim, rgba(245, 158, 11, 0.12));
  border-color: var(--forge-accent);
  color: var(--forge-accent);
}
.v21-count {
  font-family: var(--font-mono, monospace);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--forge-muted);
}
.v21-noresults {
  display: none;
  margin: 2rem 0;
  padding: 1.25rem 1.5rem;
  border: 0.5px dashed var(--forge-border-hover, rgba(255, 255, 255, 0.14));
  border-radius: 6px;
  color: var(--forge-muted);
  font-size: 14px;
}
.v21-noresults.is-visible { display: block; }
.article-card[hidden], .article-category[hidden] { display: none !important; }

/* ---- Roadmap (upcoming guides) ---- */
.v21-roadmap {
  margin-top: 4rem;
  border: 0.5px solid var(--forge-border);
  border-radius: 6px;
  background: var(--forge-surface);
}
.v21-roadmap > summary {
  cursor: pointer;
  list-style: none;
  padding: 1.1rem 1.5rem;
  font-family: var(--font-mono, monospace);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--forge-accent);
}
.v21-roadmap > summary::-webkit-details-marker { display: none; }
.v21-roadmap > summary::before { content: '▸ '; }
.v21-roadmap[open] > summary::before { content: '▾ '; }
.v21-roadmap-inner { padding: 0 1.5rem 1.5rem; }
.v21-roadmap-note { font-size: 13px; color: var(--forge-muted); margin-bottom: 0.5rem; }
.v21-roadmap .article-card--coming { opacity: 0.8; }

/* ---- Article pages: breadcrumbs + table of contents ---- */
.v21-crumbs {
  font-family: var(--font-mono, monospace);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--forge-muted);
  margin-bottom: 1.5rem;
}
.v21-crumbs a { color: var(--forge-muted); text-decoration: none; }
.v21-crumbs a:hover { color: var(--forge-accent); }
.v21-crumbs [aria-current] { color: var(--forge-text); }

.v21-toc {
  margin: 0 0 2rem;
  padding: 1rem 1.25rem;
  background: var(--forge-surface);
  border: 0.5px solid var(--forge-border);
  border-radius: 6px;
}
.v21-toc > summary {
  cursor: pointer;
  font-family: var(--font-mono, monospace);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--forge-accent);
}
.v21-toc ol { list-style: none; margin: 0.75rem 0 0; padding: 0; }
.v21-toc li { margin: 0; }
.v21-toc a {
  display: block;
  padding: 4px 0 4px 10px;
  border-left: 2px solid transparent;
  font-size: 12.5px;
  line-height: 1.45;
  color: var(--forge-muted);
  text-decoration: none;
}
.v21-toc a:hover { color: var(--forge-text); }
.v21-toc a.is-active { color: var(--forge-accent); border-left-color: var(--forge-accent); }
.article-wrap h2[id] { scroll-margin-top: 90px; }

@media (min-width: 1280px) {
  /* Floats in the left gutter and sticks while reading; it stops at the end of the article,
     so it can never overlap the footer. */
  .v21-toc {
    float: left;
    position: sticky;
    top: 100px;
    width: 230px;
    margin: 0 0 0 -270px;
    max-height: calc(100vh - 140px);
    overflow-y: auto;
    padding: 0.5rem 0.5rem 0.5rem 1rem;
    background: transparent;
    border: none;
    border-left: 0.5px solid var(--forge-border);
    border-radius: 0;
  }
  .v21-toc > summary { pointer-events: none; list-style: none; }
  .v21-toc > summary::-webkit-details-marker { display: none; }
}

/* ---- Calculators: pinned result bar + reset + validation ---- */
.v21-resultbar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 90;
  display: none;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
  padding: 0.65rem 1.25rem calc(0.65rem + env(safe-area-inset-bottom, 0px));
  background: rgba(22, 22, 24, 0.97);
  backdrop-filter: blur(10px);
  border-top: 0.5px solid var(--forge-accent);
  cursor: pointer;
}
.v21-resultbar.is-visible { display: flex; }
.v21-resultbar .rb-item { display: flex; flex-direction: column; min-width: 0; }
.v21-resultbar .rb-label {
  font-family: var(--font-mono, monospace);
  font-size: 9px;
  letter-spacing: 0.1em;
  color: var(--forge-muted);
  text-transform: uppercase;
}
.v21-resultbar .rb-value {
  font-family: var(--font-mono, monospace);
  font-size: 14px;
  font-weight: 700;
  color: var(--forge-accent);
  white-space: nowrap;
}
.v21-resultbar .rb-go {
  margin-left: auto;
  font-family: var(--font-mono, monospace);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--forge-muted);
}
@media (max-width: 600px) {
  .v21-resultbar { gap: 0.9rem; padding-left: 1rem; padding-right: 1rem; }
  .v21-resultbar .rb-value { font-size: 13px; }
  .v21-resultbar .rb-go { display: none; }
}
body.has-resultbar { padding-bottom: 4.5rem; }

.calc-field input.is-invalid, .calc-field select.is-invalid, input.is-invalid {
  border-color: #f87171 !important;
  box-shadow: 0 0 0 1px rgba(248, 113, 113, 0.35);
}
.v21-field-msg {
  display: block;
  margin-top: 4px;
  font-size: 11px;
  color: #f87171;
}

/* ---- Print: articles + shared chrome ---- */
@media print {
  .skip-link, .v21-resultbar, .v21-toc, .v21-filterbar, .v21-crumbs,
  .share-row, .article-back { display: none !important; }
  .article-wrap { max-width: none !important; padding: 0 !important; }
  .article-wrap *, .policy-wrap * {
    background: transparent !important;
    color: #111 !important;
    border-color: #999 !important;
    box-shadow: none !important;
  }
  .article-wrap h1, .article-wrap h2, .article-wrap h3 { break-after: avoid; }
  .article-wrap p, .article-wrap li { orphans: 3; widows: 3; }
  .article-wrap table, .article-wrap pre, .article-refs { break-inside: avoid; }
  .article-wrap a[href^="http"]::after { content: " (" attr(href) ")"; font-size: 9px; word-break: break-all; }
}

/* ---- Database filter ---- */
.db-row[hidden], .db-category[hidden] { display: none !important; }
.db-card-link{white-space:nowrap}

/* ---- Header: menu truly centered on the page (logo left, search right) ---- */
@media (min-width: 769px) {
  .nav-inner { display: grid; grid-template-columns: 1fr auto 1fr; }
  .nav-logo { justify-self: start; }
  .nav-links { justify-self: center; }
  .nav-search-btn { justify-self: end; margin-right: 0; }
  .nav-hamburger { display: none; }
}